From perlfaq4:

Use a hash. When you think the words "unique" or "duplicated", think "hash keys". If you don't care about the order of the elements, you could just create the hash then extract the keys. It's not important how you create that hash: just that you use keys to get the unique elements. 

   my %hash   = map { $_, 1 } @array;
   # or a hash slice: @hash{ @array } = ();
   # or a foreach: $hash{$_} = 1 foreach ( @array );

   my @unique = keys %hash;

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(This is also cited in perlmonks Q&A here).

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"If there is such a phenomenon as absolute evil, it consists in treating another human being as a thing."

John Brunner, "The Shockwave Rider".

In reply to Re: removing repeated elements from one array by g0n
in thread removing repeated elements from one array by perlbeginner10

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